Dicarboxylic acids and dicarboxylic acid esters containing a ben

Details Dicarboxylic acids and dicarboxylic acid esters containing a ben Dicarboxylic acids and dicarboxylic acid esters containing a ben

1977-05-06

1979-07-17

Coughlan, Jr., Paul M.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

544302, 544314, 548301, 548307, C07D23526

Patent

active

041616030

ABSTRACT:
Dicarboxylic acids or dicarboxylic acid esters, containing a N,N-heterocyclic radical, of the formula ##STR1## in which the two R.sub.1 independently of one another each denote hydrogen, an alkyl with 1 to 4 C atoms or a phenyl, the two R.sub.2 independently of one another each denote hydrogen or an alkyl with 1 to 10 C atoms, the two n represent identical or different numbers from 2 to 12 and X denotes a divalent monocyclic N,N-heterocyclic radical of benzimidazolone, parabanic acid, 2,2-dimethylimidazolidine-4,5-dione, 6-ethyluracil or barbituric acid are prepared by reacting 1 mol of the corresponding N,N-heterocyclic compounds with 2 mols of a compound of the formula ##STR2## wherein Y.sub.1 denotes a chlorine or bromine atom. The dicarboxylic acid compounds have a high stability to heat and therefore are very suited for the manufacture of polycondensates by the melt condensation process.

REFERENCES:
patent: 3954790 (1976-05-01), Habermeier

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